1321100331240 has 32 divisors (see below), whose sum is σ = 3963300994080. Its totient is φ = 352293421632.

The previous prime is 1321100331181. The next prime is 1321100331319. The reversal of 1321100331240 is 421330011231.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5504584594 + ... + 5504584833.

It is an arithmetic number, because the mean of its divisors is an integer number (123853156065).

Almost surely, 2^{1321100331240} is an apocalyptic number.

1321100331240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321100331240 is an abundant number, since it is smaller than the sum of its proper divisors (2642200662840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321100331240 is a wasteful number, since it uses less digits than its factorization.

1321100331240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11009169441 (or 11009169437 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1321100331240 its reverse (421330011231), we get a palindrome (1742430342471).

The spelling of 1321100331240 in words is "one trillion, three hundred twenty-one billion, one hundred million, three hundred thirty-one thousand, two hundred forty".